avast! will have the following behavior (depending of your settings):

  1. If just the attach is infected, it will be deleted (if you set so) and a not will be posted in the body of the message (see your pictures).
  2. If both attach and body are suspiciuos, you will be prompted do delete all the message (body and attach).

If I’m wrong, avast! team will correct me.
In Professional version, this settings could be fully configurated. In Home, some of them are default. :wink: